Ink eradicator



Q1252. COMPOSITIONS,

, usefuln Patented Dec. 4, 1923.

UNITED STATES THOIAS W. GAPPON, OF NEWARK, NEW JERSEY.

INK EBAIDICATOB.

Io Drawing.

To all whom it may concern:

Be it known that I, THOMAS W. CAPPON, a citizen of the United States,residing at Newark, State of New Jersey, have invented a certainImprovement in Ink Eradicators, of which the following is aspecification.

The present invention relates to an improved method for removin frompaper and fabric lines and spots 0% ink or other substances as well asto a stable and relatively inexpensive composition which can be used forthis purpose leaving the ink bearing surface uninjured.

It is a prominent advantage of this composition that it supplies thelong felt want for a commercial one-fluid eradicator. The rapid andcomplete action achieved by this composition is another feature ofadvanta e.

The present compound is a mixture of two solutions, one of which acts asan oxidizer while the other solution which is of a nature not to beoxidized by the first named, acts as a decolorizer for the materialresulting from the action of the oxidizer. For this purpose I have foundthat the reagents named below have the qualities named, and operate,each in its own way, to accomplish the desired results.

My preferred oxidizer is a solution of a gydplochlorite of an alkalimetal preferably 'um. This solution should be fairly strong and I havefound a ten percent solution quite practicable. a

Ordinary ypochlorite is generally too alkaline in its reaction, andenough dilute hydrochloric acid should be added to make the solutionfaintly alkaline as tested with litmus pa r.

The ot er fluid is a solution of any reagent which will not be oxidizedby the h pochlorite and which has the property of forming a white orvery light colored precipitate in its reaction upon the salts producedby the hypochlorite.

For this latter purpose three salts have been found useful in solution,namely, the

ortho-phosphate, the pyrophosphate and the metaphosphate of an alkalimetal. These are named in the ascending order of ass.

The orthophosphate of sodium (for instance) reacts upon the iron saltsresulting from the hypochlorite to form a very light Application MedDecember 15, 1921. Serial Io. 522,892.

yellow substance; so that, while this salt may be used for somepurposes, it cannot be said to give the best results.

The pyrophosphate gives a. better result, although especially after alapse of some time, a very faint eyish line can be detected where the erication has taken place. This salt has in its favor, however, the factthat it is perfectly stable. Even prolonged boiling causes nodecomposition.

The best results are roduced by the metaphosphate. Where t is salt isused, the resultant reaction leaves a substance as white as the paperitself, and therefore practically invisible.

The orthophosphate is, of course, the salt corresponding toorthophosphonc acid. The other two salts named are made from more orless dehydrated orthophosphoric acid, since pyrophosphoric acid resultsfrom removing one molecule of water from two molecules of orthophoshoric acid, and metaphosphoric acid resu ts from removing two moleculesof water from two molecules of orthophosphoric acid. As above pointedout, the salts made from more or less dehydrated acid are distinctlysuperior to the orthophosphates in this connection.

As an example of proportions that have been found satisfactory inpractice, the following may be mentioned.

With the h chlorite solution of the stren a ove'sta e e orthopho hate ofsodium (for instance) may be usec l in a saturated solution in theproportion of one part of orthophosphate to three parts of hypochlorite.The yrophosphate in saturated solution may used in the roportion of onepart of the pyrophosp ate to three of hypochlorite. The metaphosphate infour or five percent solution may be used in the proportion of one ofthe metaphosphate to four of the hypochlorite. These proportions are byvolume, and they may be greatly varied without departing from theinvention, which is not limited to the proportions stated.

By using an excess of the above described mixture and leaving it for awhile upon the spot or line to be eradicated, the precipitate formed maybe entirely dissolved and removed s well as being decolorized,especially where the ink contains organic matter. I

This compound is not alone useful for inks, but is highly effective inremoving fruit stains, blood-stains, etc.

While the ingredients above set forth have been herein described asbeing mixed to form a one-fluid eradicator, it is evident that theimproved process forming the basis of this invention may be carried outin practice by supplying the hypochlorite in one solution and the otheringredient in a separate solution, permitting the user to form themixture directly on the ink mark to be treated.

What is claimed is- 1. The process of eradicating ordinary inks fromaper and other materials of the character esorlbed which consists insubjecting the ink line or spot to the action of an alkali hypochloriteand immediately decolorizing the resulting product by treating the samewith an alkali phosphate.

2. The process of eradicating ordinary inks from paper and othermaterials of the character described which consists in subjecting theink line or spot to the action of an alkali hypochlorite and immediatelydecolorizing the resulting product by treating the same with an alkaliphosphate made from more or less dehydrated orthophosphoric acid.

3. The process of eradicating ordinary inks from aper and othermaterials of the character escribed which consists in subjecting the inkline or spot to the action of an alkali hypochlorite and immediately de-.MHMR LSQ LAlME R 1,475,932.-fl7t0mas W. Oappon, Newark, N. J. INK

December 4, 1923. Disclaimer filed Janu colorizing the resultin productby treating the same with an alka i metaphosphate.

4. A single fluid eradicator comprising a mixture of an alkalihypochlorite with an alkali phosphate.

5.'A single fluid eradicator comprising a mixture of an alkalihypochlorite with an alkali phosphate made from more or less dehydratedortho hosphoric acid.

6. A single uid ink eradicator comprising a mixture of an alkalihypochlorite with an alkali metaphosphatc.

7. A single fluid ink eradicator comprising a mixture of sodiumhypochlorite and sodium metaphosphate.

8. A single fluid eradicator comprising a mixture of two solutions oneof which is an alkali hypochlorite and the other of which is incapableof material oxidation by the first named solution and acts as adecolormen 9. The process of eradicating inks from paper and othermaterials which consists in applying to the ink line or spot an alkalihypochlorite and an alkali phosphate more or less dehydrated in such amanner that both of said reagents are present upon the Inc or spot atonce, substantially as described. I

In testimony whereof I have hereto set my hand on this 13th day ofDecember, 1921.

THOMAS W. CAPPON.

Emmca'roa. Patent dated 16, 1937, by the patentee and the assignee ofone-half interest, C'ard'ne Corporation. Hereb enter the followingdisclaimer to claim 8: Petitidiiers disclaim from the scope of claim 8any single fluid eradicator in which the solution acting as adecolorizer is not an alkah phosphate.

[Oflicial Gazette February 9, 1937.1

DISCLAIM-ER 1,475,932.Thomas W. Gappon, Newark, N. J. INK Enamca'ron.Patent dated December 4, 1923. Disclaimer filed February 6, 1%?37, bythe patentee and the assignee of one-half interest, CardinellOorporatwn.

Hereb Gazette March 2, 1937.]

enter this disclaimer to claim 8 of the Letters Patent.

